Knife gate valve



FIG. 1 is a perspective view taken from the top, front and right side of a knife gate valve showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof, the left side being a mirror image of the side shown; and

FIG. 7 is a vertical sectional view taken along line 7--7 of FIG. 4. 

The ornamental design for a knife gate valve, as shown and described. 